Quantum Extension of the Jarzynski Relation

Details Quantum Extension of the Jarzynski Relation Quantum Extension of the Jarzynski Relation

2003-02-10

arxiv.org/abs/cond-mat/0302190v2

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

The relation between the distribution of work performed on a classical system by an external force switched on an arbitrary timescale, and the corresponding equilibrium free energy difference, is generalized to quantum systems. Using the adiabatic representation we show that this relation holds for isolated systems as well as for systems coupled to a bath described by a master equation. A close formal analogy is established between the present classical trajectory picture over populations of adiabatic states and phase fluctuations (dephasing) of a quantum coherence in spectral lineshapes, described by the stochastic Liouville equation.

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